Method for fixing an energy-storing flywheel with pretension on a support and unit comprising an energy storing flywheel

Abstract

Method for applying an energy-storing flywheel (2) with pre-tension with an inner bore on a coaxial support (16) rotating symmetrically with the latter and having a tapering outer surface, in which a ring (22a, 22b, 22c, 22d) is placed in the flywheel bore with a tapering inner surface, of which the taper corresponds with that of the support (16) and the entire unit thus obtained is shifted on the support (16) until the desired pre-tension is obtained. In accordance with the invention both the inner bore of the flywheel (18a, 18b, 18c, 18d) and the outer surface of the ring (22a, 22b, 22c, 22d), which co-operate, have a design with a corresponding taper. Furthermore. The invention includes a clamping ring (22a), which can be used when using this method, having a tapering inner surface, the outer surface, intended for functioning with the flywheel being also conical.

I claim: 
     
       1. Method for pretensioning an energy-storing flywheel (18a-18d) having a tapering inner bore and mounting the flywheel on a coaxial support (16) having a tapering outer surface and rotating symmetrically with the flywheel comprising the steps of: placing a ring (22a-22d) having an uninterrupted outer tapering surface (26a) into engagement with the tapering flywheel bore, said ring having a tapering inner surface (24a), the tapering inner surface of the ring corresponding to and engaging the tapering outer surface of the coaxial support, shifting of the ring within the flywheel bore on the support until the desired pre-tension is obtained, forming each of the inner bore of the flywheel and the outer surface (26a) of the ring with a corresponding taper which fit closely with each other. 
     
     
       2. A unit comprising an energy-storing flywheel (18a-18d) having a tapered inner bore, a coaxial support (16) rotating symmetrically with the flywheel (18a-18d) and having a tapering outer surface (20a), and a prefabricated clamping ring (22a-22d) having a tapering inner surface corresponding to and engaging the tapering outer surface (20a) of the support (16), the clamping ring (22a-22d) having an uninterrupted outer tapering surface (26a) in engagement with the inner bore of the flywheel (18a-18d), the clamping ring (22a-22d) tapering outer surface (26a) has an increasing conical taper corresponding to a similarly decreasing conical taper of the inner bore of the flywheel (18a-18d). 
     
     
       3. A unit according to claim 2 wherein the taper of the outer surface of the ring lies between 1:60 and 1:100. 
     
     
       4. A unit according to claim 2 wherein the inner (24a) and outer (26a) surfaces of the clamping ring (22a-22d) are tapered in the same direction. 
     
     
       5. A unit according to claim 4 wherein the taper of the inner (24a) and outer (26a) surfaces of the clamping ring is the same.